Pain Flashcards
What are the two ascending neural pathways of the sematosensory system
discriminative
antereolateral
What type of transmission does the discrim pathway use
rapid transmission such as discriminative touch
What types of neurons does the discrim pathway use
dorsal root ganglions
dorsal collumn nuclei
thalamic neurons
What is the pathway of discrim
the dorsal root ganglion project there axons into the dorsal horn of the spinal cord where the dorsal column nuclei send there axons across the midline of the medulla and into the thalamus, then the thalamic neurons project into the primary somatosensory cortex
What are the dorsal column nuclei called when they band together at the midline of the medulla
medial lemniscus
What type of sensations does the discriminative pathway read
position
discriminative touch
What is a distinct feature of the discrim path
it relays precise information of spatial orientation
The precise information of spatial orientation in discrim path is the only pathway for what
muscle and joint movement
vibration
delicate discrim touch
What test is testing the discriminative path
two point discrimination
Whats an example of the discrim path
identifying what an object with only touch
What is this example called
stereognosis
What happens if the person has damage to the association area of the brain relating to discrim path
they will be able to discribe something but unable to identify what it is
What is this deficit called
astereognosis
What does the anterolateral pathway consist of
bilateral, multisynaptic, and slow-conducting tracts
What types of sensation does the anterolateral path signal
pain
thermal
crude touch
pressure
Where does the anterolateral path neurons start
dorsal horns at the segmental nerve level of the spinal cord
Where do the neurons of the ant path travel to in the spinal cord
they pass over the anterior commissure, within a few segments, into the anterolateral column on the opposite side of the cord
What type of neurons and how many, does the neospinal stract use
at least three neurons with long axons
What type of neurons does the paleospinal tract use
bilateral, multisynaptic, and slow-conducting
What does the paleospinal tract give touch
its emotional aspect
What does the paleospinal tract affect
mood arousal attention and the startled reaction from intense stimuli
the ANS responses like HR, BP, pupil dilation, skin conditions
Is touch or thermal sensation perceived faster
touch
All tactile sensation that requires rapid transmission take
the discriminative path
Position sense is impaired by
damage to the posterior column of the spinal cord
